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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />stage events. SmaIl drainage channels from the pipe outlets would need to be <br />excavated as shown on plate 2. The pipe locations may have to be adjusted during final <br />design once the surveyed information for existing ground topography is available. U <br />possible, the inlet of the pipes should be located in sump conditions to maximize pipe <br />capacities and to minimize ponding depths behind the levee. A typical cross-section of <br />a levee with an interior drainage culvert is shown on plate 2. <br /> <br />The purpose of the cursory analysis for the interior drainage at site" A" was to develop <br />conceptual facilities and construction costs, but the analysis includes many assumptions <br />that may not be suitable for final design purposes. Additional analyses for interior <br />drainage facilities would be required for final design. <br /> <br />The preliminary construction costs for the proposed 100-year and 500-year facilities are <br />presented in table 2. The preliminary costs estimates include the major items required <br />for construction of the proposed facilities. It was assumed that acceptable fill material <br />for the levees could be obtained from the borrow site located on the east side of the <br />fairgrounds Miscellaneous items such as mobilization, clearing and grubbing, seeding, <br />relocation of utilities/structures, and restoration were not included. A 25 percent <br />contingency was, however, included in the total estimated cost Real estate acquisition <br />costs were not estimated for this study. <br /> <br />10 <br />